JP2011047795A - Wheel balancer device for vehicle, and mounting method of balance weight - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wheel balancer device rotating at high speed in the state where a tire and a wheel are mounted on a tip part of a rotation main shaft, measuring an unbalance quantity and an unbalance position from a generated centrifugal force, and displaying the unbalance quantity on a display panel. <P>SOLUTION: In the wheel balancer device, a laser length-measuring sensor 6 is mounted on a body 1 in order to measure an in-side inner diameter of a rim, a rim width and a distance, and the laser length-measuring sensor 6 is attached to the tip of a slide rod, and a laser moving device 8 for sliding the slide rod on which the laser length-measuring sensor 6 is mounted is provided. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a wheel balancer device for adjusting the balance of a wheel equipped with a tire, and a method for measuring balance and attaching a balance weight.

  The wheels of the vehicle must be perfectly balanced about the axle. If the tire is in an unbalanced state, it acts as a large centrifugal force even at a small unbalanced amount during high-speed rotation. This centrifugal force is used in a perfectly balanced state because it causes tires to wear out early and is dangerous for driving operations.

By the way, since the tire and the wheel on which the tire is mounted are not perfectly balanced at the time of manufacture and assembly, the balancer device corrects the unbalance prior to mounting on the vehicle shaft. Here, although detailed explanation of the structure of the balancer device is omitted, in general, the rotation main shaft is supported by bearings installed at two positions with a certain interval, and a tire and a wheel are mounted on the tip of the rotation main shaft. Thus, the centrifugal force generated due to the unbalance amount is measured by the bearing portion, and the desired unbalance amount is detected.

Since this unbalance amount is displayed on the display panel together with the unbalanced portion of the tire / wheel, a weight (weight) of the displayed weight can be attached to a predetermined portion. By the way, when measuring the unbalance of tires and wheels, the wheel is mounted on the main shaft of the balancer device and rotates at high speed, but the diameter inside the rim to which the weight is attached prior to measurement, the outside and inside the rim to which the weight is attached The distance between them (rim width) and the distance to the rim-in side where the scale lever and inner weight are attached are measured.

  The inside and outside are relatively flat portions suitable for attaching weights, and measurement of each of these portions is performed using a dedicated scale lever. FIG. 5 shows each operation process of measuring the inner diameter of the rim, the rim width, and the distance with the scale lever. In the figure, (A) represents a wheel, (B) represents a main shaft, (C) represents a wheel receiver, (D) represents a fixed handle, and (C) represents a cone.

(A) is the case where the wheel (b) is mounted on the main shaft (b), and the wheel (b) hits the wheel receiver (c) attached to the main shaft (b) and the cone (h). The wheel (A) is fixed to the main shaft (B) by tightening the fixed handle (D). In this state, the scale lever (e) provided in the main body is pulled out, and the inner diameter of the rim is measured. Further, the distance L to the inside of the rim is measured. Here, the measured inner diameter of the rim and the distance L are input to the apparatus.

(B) The scale lever (e) is further extended to measure the distance to the outside of the rim (that is, the rim width), and this data is also input to the main body.
(C) If the scale lever (e) is returned to its original position and the start button is pushed, the wheel (b) rotates at a high speed together with the main shaft (b), and the balance of the wheel (b) is measured.

(D) If the balance measurement is completed by rotating the wheel (a) for a predetermined time, the unbalance amount inside and outside the rim is displayed on the display panel. Then, the wheel (A) rotates so that the position of the weight to be attached to correct the unbalance amount is directly above the wheel (A), and the inner weight of the size displayed directly above the wheel ( F) is installed. Here, a specific attachment method is not limited, but a double-sided tape is generally used.

(E) If the NEXT button is pressed after the inner weight (f) is attached, the wheel (a) rotates by a predetermined angle and stops. Then, a predetermined outer weight (g) displayed just above the outer side of the rim is attached.
Thus, the scale lever (e) measures and inputs the rim inner diameter, distance L, and rim width of the wheel (b), and then rotates the wheel (b) to rotate the wheel (b). The amount of unbalance is measured. In order to correct the unbalance amount, the position where the wheel is attached to the inside of the rim and the position where it is attached to the outside of the rim are controlled so that the wheel automatically rotates and comes directly above.

  The conventional tire / wheel balancer apparatus is configured as described above. However, when the operator pulls out the scale lever (e) and measures the inner diameter, distance, and rim width of the rim of the wheel (a), there are variations and it is time consuming and troublesome. Of course, not only the measurement value variation but also a measurement error may be made, and there are times when the balance measurement must be repeated from the beginning. Therefore, in recent years, a balancer device is known that uses a laser beam instead of the scale lever so that the measurement value does not vary quickly.

  “Vehicle wheel optical scanning device and scanning method” according to Japanese Patent Application Laid-Open No. 2002-122499 is an optical scanning device and operation method for a vehicle wheel, which projects a light beam from a light source and receives a position detection light-receiving unit. The position on the wheel is detected by reflecting the light toward the wheel. The relative position of the second position with respect to the reference position is measured based on the direction of the projected ray and the reflected ray. The light source and the light receiving unit for position detection can be rotated in synchronization with each other around a common axis line by a rotation driving mechanism having a stepping motor, thereby performing a continuous measurement process. The rotation angle sensor can output a signal proportional to the rotation angle position of the stepping motor to the electronic evaluation mechanism.

Japanese Patent Application Laid-Open No. 2004-109132 discloses a method and an apparatus for measuring geometric data of an automobile wheel that is rotatably installed around a rotation axis. A method and apparatus for measuring geometric data.
Therefore, in at least two planes perpendicular to the rotation axis 1, distances from the reference position and rotation angle position of each measurement point to a plurality of measurement points on each outer edge of the corresponding part of the wheel (wheel rim) are measured, The position of the automotive wheel relative to the axis of rotation is determined from the measured value.

“Optical scanning device and scanning method for vehicle wheel” according to Japanese Patent Application Laid-Open No. 2002-122499 Japanese Patent Laid-Open No. 2004-109132 “Method and Apparatus for Measuring Geometric Data of an Automobile Wheel Rotated Around a Rotating Axis”

  By irradiating the laser beam in this way, the position where the weight can be attached can be quickly measured, but the portion to be irradiated with the laser beam has a swinging mechanism. Therefore, when irradiating a laser beam far away, the amount of reflected laser beam is reduced and the measurement accuracy is lowered. The problem to be solved by the present invention is this problem, and provides a wheel balancer device that can measure with higher accuracy using a laser beam.

  The wheel balancer device according to the present invention calculates the unbalance amount and the unbalance position by rotating the wheel on which the tire is mounted at high speed, calculates the unbalance amount on the out side (outside), and the unbalance on the in side (inside). The conventional apparatus is the same in that the quantity is calculated and displayed on the display panel. Therefore, the spindle rotated by the motor is supported by both bearings provided at a predetermined interval, and a wheel receiver for positioning the wheel is attached to the tip of the spindle and a fixed handle for fixing the wheel is attached. ing.

  Also, a laser length sensor is attached to the main body of the device, and the laser length sensor is attached to the tip of the slide rod, and the slide rod slides into the wheel attached to the tip of the spindle. I can do it. For this purpose, a laser moving device is provided. A laser beam is emitted from the laser measuring sensor, and this laser beam is applied to the inner peripheral surface of the rim of the wheel to receive the reflected light. The inner side (inner side) inner diameter of the rim, the rim width, and the distance from the sensor to the inner side of the rim (Distance) is measured.

Actually, the inner surface of the rim is read as the laser measuring sensor moves, and the rim's in-side (inside) inner diameter, rim width, and distance to the rim's in-side (distance) are calculated later. Is required. The laser beam emitted from the laser length measuring sensor is applied to the inner peripheral surface of the rim of the wheel, and the irradiation position is set so that the weight can be easily attached. For example, irradiation is performed directly below the rim, and the inner peripheral surface shape of the rim is read by receiving the reflected light.

  The wheel balancer device according to the present invention is provided with a laser length measurement sensor, and is horizontally moved along the main axis while irradiating a laser beam from the laser length measurement sensor, so that the laser beam hits the rim inner peripheral surface of the wheel and is reflected. The shape of the inner peripheral surface of the rim can be read. Then, the inner diameter of the rim-in side, the rim width, and the distance can be calculated from the shape of the inner peripheral surface of the rim, and can be obtained accurately and quickly. Of course, since the laser length sensor automatically moves and the shape is read and then automatically calculated, skill is not required as in the case of measurement using a conventional scale.

  After the balance measurement, the attached weight is displayed on the display panel, and when the weight is attached, the laser length measurement sensor moves again to irradiate the inner surface of the rim. Therefore, the position where the weight is attached is accurately determined by the irradiation light, and an accurate balance between the tire and the wheel can be realized.

The front view of the wheel balancer apparatus which concerns on this invention. The top view of the wheel balancer apparatus which concerns on this invention. The side view of the wheel balancer device concerning the present invention. A method of measuring the inner rim inner diameter, rim width, and distance using a laser measuring sensor. A method of measuring an inner rim inner diameter, a rim width, and a distance using a scale lever of a conventional wheel balancer device.

1 to 3 are schematic views of a wheel balancer device according to the present invention. FIG. 1 is a front view including a cross section, FIG. 2 is a plan view including the cross section, and FIG. 3 is a side view including the cross section. . In the figure, 1 is a main body, 2 is a display / operation unit, 3 is a wheel, 4 is a main shaft, 5 is a tire, and 6 is a laser length measuring sensor. The display unit / operation unit 2 is attached to the upper part of the main body 1, the main shaft 4 extends horizontally from the side surface of the main body 1, and the main shaft 4 is installed at two positions within the main body 1 at a predetermined distance. The centrifugal force that is supported by the bearings 7a and 7b and is generated based on the unbalance amount of the wheel is detected as a reaction force acting on the bearing.

A brake motor (not shown) is mounted inside the main body 1 so that the main shaft 4 can be rotationally driven via a belt, and the wheel 3 attached to the tip of the main shaft 4 rotates at high speed together with the main shaft 4. I can do it. The tire 3 is mounted on the wheel 3, but the centrifugal force generated in the tire / wheel 3 in an unbalanced state by rotating at high speed acts on both bearings 7a and 7b, and acts on both bearings 7a and 7b. While detecting the load, the unbalance amount and its position are calculated and obtained.

By the way, unbalance measurement is performed in the following procedure.
(A) When a start button provided on the display / operation unit 2 is pressed, the laser measuring sensor 6 moves to the wheel side and starts reading the rim inner peripheral surface shape of the wheel 3. The main body 1 is provided with a laser moving device 8, and the laser length measuring sensor 6 attached to the tip of the slide rod can be moved to the wheel side by sliding the slide rod by operating the laser moving device 8. I can do it. Although the specific structure of the laser moving device 8 is not limited, a stepping motor for sliding the slide bar is provided, and the stepping motor can be controlled by a computer.

(B) When the laser length measurement sensor 6 moves and moves to the vicinity of the flange surface 10 of the wheel 3, it moves backward to the original position. The laser length measuring sensor 6 moves while irradiating a laser beam. The irradiated laser beam strikes and reflects the inner peripheral surface of the rim, and the inner peripheral surface shape of the rim is read by receiving the reflected light. A conventional well-known technique is used as a method of reading the shape by irradiating the laser beam and receiving light reflected by the inner peripheral surface of the rim at the light receiving portion.

(C) If the laser length measurement sensor 6 is retracted and returned to its original position, the inner rim inner diameter, the rim width, and the distance are obtained based on the read inner peripheral surface shape of the rim. Then, the wheel 3 on which the tire 5 is mounted together with the main shaft 4 automatically rotates, and the balance is measured.

(D) When the balance measurement is completed by rotating for a predetermined time, the unbalance amount is displayed on the display panel of the display / operation unit 2. Therefore, initially, the wheel 3 is rotated to be attached to the inner periphery of the rim on the in side, and is stopped so that the inner weight 11 can be attached downward. That is, the wheel 3 is controlled by the inverter 9 so that the inner weight 11 can be attached to the position in the rim lower direction.

(E) After the inner weight 11 is attached to the inner peripheral surface of the rim, if the NEXT button is pressed, the wheel 3 rotates by a predetermined angle, and the outer weight 12 is moved downward on the inner peripheral surface of the rim. Stop to install in position. Here, when the inner weight 11 and the outer weight 12 are attached, the laser length measurement sensor 6 moves again to the wheel side as shown in FIGS. Irradiate a laser beam in the direction. Even if it is simply referred to as the downward direction of the rim, the range is indeterminate, so that the position can be accurately specified at one point by irradiation with a laser beam.

DESCRIPTION OF SYMBOLS 1 Main body 2 Display part and operation part 3 Wheel 4 Spindle 5 Tire 6 Laser length sensor 7 Bearing 8 Laser moving device 9 Inverter
10 Flange surface
11 Inner weight
12 Outer weight

Claims (2)

In a wheel balancer device that rotates at high speed with the tire and wheel attached to the tip of the rotating spindle, measures the unbalance amount and unbalance position from the generated centrifugal force, and displays the unbalance amount on the display panel. A laser measuring sensor is attached to the main body to measure the inner diameter, rim width, and distance of the laser. The laser measuring sensor is attached to the tip of the slide bar, and the slide bar to which the laser length sensor is attached is attached. A wheel balancer device comprising a laser moving device for sliding. In the method of attaching the balance weight by measuring the unbalance amount and unbalance position from the generated centrifugal force with the tire and wheel attached to the tip of the rotating spindle, and attaching the balance weight, the tip of the slide bar A laser measuring sensor is attached to the laser measuring sensor, a laser beam is irradiated from the laser measuring sensor, and the inner peripheral surface shape of the rim is read by receiving light reflected on the inner peripheral surface of the rim, and from the read inner peripheral surface shape of the rim. Calculates the inner rim diameter, rim width, and distance of the rim, then rotates the tire and wheel together with the main shaft at high speed to measure the unbalance amount, and displays the unbalance amount on the rim in and out sides on the display panel. Attach the inner weight to the position where the laser measuring sensor irradiates the inner rim inner surface, and then press the NEXT button. And rotating the wheel by a predetermined angle, the mounting method of the balance weight which can be attached to the outer weight on a position of irradiating the laser length sensor rim inner peripheral surface of the out-side.

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